F: include/linux/ata.h
F: include/linux/libata.h
-LIBLOCKDEP
-M: Sasha Levin <alexander.levin@microsoft.com>
-S: Maintained
-F: tools/lib/lockdep/
-
LIBNVDIMM BLK: MMIO-APERTURE DRIVER
M: Dan Williams <dan.j.williams@intel.com>
M: Vishal Verma <vishal.l.verma@intel.com>
@echo ' intel-speed-select - Intel Speed Select tool'
@echo ' kvm_stat - top-like utility for displaying kvm statistics'
@echo ' leds - LEDs tools'
- @echo ' liblockdep - user-space wrapper for kernel locking-validator'
@echo ' objtool - an ELF object analysis tool'
@echo ' pci - PCI tools'
@echo ' perf - Linux performance measurement and analysis tool'
bpf/%: FORCE
$(call descend,$@)
-liblockdep: FORCE
- $(call descend,lib/lockdep)
-
libapi: FORCE
$(call descend,lib/api)
kvm_stat: FORCE
$(call descend,kvm/$@)
-all: acpi cgroup counter cpupower gpio hv firewire liblockdep \
+all: acpi cgroup counter cpupower gpio hv firewire \
perf selftests bootconfig spi turbostat usb \
virtio vm bpf x86_energy_perf_policy \
tmon freefall iio objtool kvm_stat wmi \
cgroup_install counter_install firewire_install gpio_install hv_install iio_install perf_install bootconfig_install spi_install usb_install virtio_install vm_install bpf_install objtool_install wmi_install pci_install debugging_install tracing_install:
$(call descend,$(@:_install=),install)
-liblockdep_install:
- $(call descend,lib/lockdep,install)
-
selftests_install:
$(call descend,testing/$(@:_install=),install)
$(call descend,kvm/$(@:_install=),install)
install: acpi_install cgroup_install counter_install cpupower_install gpio_install \
- hv_install firewire_install iio_install liblockdep_install \
+ hv_install firewire_install iio_install \
perf_install selftests_install turbostat_install usb_install \
virtio_install vm_install bpf_install x86_energy_perf_policy_install \
tmon_install freefall_install objtool_install kvm_stat_install \
cgroup_clean counter_clean hv_clean firewire_clean bootconfig_clean spi_clean usb_clean virtio_clean vm_clean wmi_clean bpf_clean iio_clean gpio_clean objtool_clean leds_clean pci_clean firmware_clean debugging_clean tracing_clean:
$(call descend,$(@:_clean=),clean)
-liblockdep_clean:
- $(call descend,lib/lockdep,clean)
-
libapi_clean:
$(call descend,lib/api,clean)
clean: acpi_clean cgroup_clean counter_clean cpupower_clean hv_clean firewire_clean \
perf_clean selftests_clean turbostat_clean bootconfig_clean spi_clean usb_clean virtio_clean \
vm_clean bpf_clean iio_clean x86_energy_perf_policy_clean tmon_clean \
- freefall_clean build_clean libbpf_clean libsubcmd_clean liblockdep_clean \
+ freefall_clean build_clean libbpf_clean libsubcmd_clean \
gpio_clean objtool_clean leds_clean wmi_clean pci_clean firmware_clean debugging_clean \
intel-speed-select_clean tracing_clean
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0-only
-liblockdep.so.*
+++ /dev/null
-liblockdep-y += common.o lockdep.o preload.o rbtree.o
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0
-# file format version
-FILE_VERSION = 1
-
-LIBLOCKDEP_VERSION=$(shell make --no-print-directory -sC ../../.. kernelversion)
-
-# Makefiles suck: This macro sets a default value of $(2) for the
-# variable named by $(1), unless the variable has been set by
-# environment or command line. This is necessary for CC and AR
-# because make sets default values, so the simpler ?= approach
-# won't work as expected.
-define allow-override
- $(if $(or $(findstring environment,$(origin $(1))),\
- $(findstring command line,$(origin $(1)))),,\
- $(eval $(1) = $(2)))
-endef
-
-# Allow setting CC and AR and LD, or setting CROSS_COMPILE as a prefix.
-$(call allow-override,CC,$(CROSS_COMPILE)gcc)
-$(call allow-override,AR,$(CROSS_COMPILE)ar)
-$(call allow-override,LD,$(CROSS_COMPILE)ld)
-
-INSTALL = install
-
-# Use DESTDIR for installing into a different root directory.
-# This is useful for building a package. The program will be
-# installed in this directory as if it was the root directory.
-# Then the build tool can move it later.
-DESTDIR ?=
-DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'
-
-prefix ?= /usr/local
-libdir_relative = lib
-libdir = $(prefix)/$(libdir_relative)
-bindir_relative = bin
-bindir = $(prefix)/$(bindir_relative)
-
-export DESTDIR DESTDIR_SQ INSTALL
-
-MAKEFLAGS += --no-print-directory
-
-include ../../scripts/Makefile.include
-
-# copy a bit from Linux kbuild
-
-ifeq ("$(origin V)", "command line")
- VERBOSE = $(V)
-endif
-ifndef VERBOSE
- VERBOSE = 0
-endif
-
-ifeq ($(srctree),)
-srctree := $(patsubst %/,%,$(dir $(CURDIR)))
-srctree := $(patsubst %/,%,$(dir $(srctree)))
-srctree := $(patsubst %/,%,$(dir $(srctree)))
-#$(info Determined 'srctree' to be $(srctree))
-endif
-
-# Shell quotes
-libdir_SQ = $(subst ','\'',$(libdir))
-bindir_SQ = $(subst ','\'',$(bindir))
-
-LIB_IN := $(OUTPUT)liblockdep-in.o
-
-BIN_FILE = lockdep
-LIB_FILE = $(OUTPUT)liblockdep.a $(OUTPUT)liblockdep.so.$(LIBLOCKDEP_VERSION)
-
-CONFIG_INCLUDES =
-CONFIG_LIBS =
-CONFIG_FLAGS =
-
-OBJ = $@
-N =
-
-export Q VERBOSE
-
-INCLUDES = -I. -I./uinclude -I./include -I../../include $(CONFIG_INCLUDES)
-
-# Set compile option CFLAGS if not set elsewhere
-CFLAGS ?= -g -DCONFIG_LOCKDEP -DCONFIG_STACKTRACE -DCONFIG_PROVE_LOCKING -DBITS_PER_LONG=__WORDSIZE -DLIBLOCKDEP_VERSION='"$(LIBLOCKDEP_VERSION)"' -rdynamic -O0 -g
-CFLAGS += -fPIC
-CFLAGS += -Wall
-
-override CFLAGS += $(CONFIG_FLAGS) $(INCLUDES) $(PLUGIN_DIR_SQ)
-
-ifeq ($(VERBOSE),1)
- Q =
- print_shared_lib_compile =
- print_install =
-else
- Q = @
- print_shared_lib_compile = echo ' LD '$(OBJ);
- print_static_lib_build = echo ' LD '$(OBJ);
- print_install = echo ' INSTALL '$1' to $(DESTDIR_SQ)$2';
-endif
-
-all:
-
-export srctree OUTPUT CC LD CFLAGS V
-include $(srctree)/tools/build/Makefile.include
-
-do_compile_shared_library = \
- ($(print_shared_lib_compile) \
- $(CC) $(LDFLAGS) --shared $^ -o $@ -lpthread -ldl -Wl,-soname='$(@F)';$(shell ln -sf $(@F) $(@D)/liblockdep.so))
-
-do_build_static_lib = \
- ($(print_static_lib_build) \
- $(RM) $@; $(AR) rcs $@ $^)
-
-CMD_TARGETS = $(LIB_FILE)
-
-TARGETS = $(CMD_TARGETS)
-
-
-all: fixdep all_cmd
-
-all_cmd: $(CMD_TARGETS)
-
-$(LIB_IN): force
- $(Q)$(MAKE) $(build)=liblockdep
-
-$(OUTPUT)liblockdep.so.$(LIBLOCKDEP_VERSION): $(LIB_IN)
- $(Q)$(do_compile_shared_library)
-
-$(OUTPUT)liblockdep.a: $(LIB_IN)
- $(Q)$(do_build_static_lib)
-
-tags: force
- $(RM) tags
- find . -name '*.[ch]' | xargs ctags --extra=+f --c-kinds=+px \
- --regex-c++='/_PE\(([^,)]*).*/TEP_ERRNO__\1/'
-
-TAGS: force
- $(RM) TAGS
- find . -name '*.[ch]' | xargs etags \
- --regex='/_PE(\([^,)]*\).*/TEP_ERRNO__\1/'
-
-define do_install
- $(print_install) \
- if [ ! -d '$(DESTDIR_SQ)$2' ]; then \
- $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$2'; \
- fi; \
- $(INSTALL) $1 '$(DESTDIR_SQ)$2'
-endef
-
-install_lib: all_cmd
- $(Q)$(call do_install,$(LIB_FILE),$(libdir_SQ))
- $(Q)$(call do_install,$(BIN_FILE),$(bindir_SQ))
-
-install: install_lib
-
-clean:
- $(RM) $(OUTPUT)*.o *~ $(TARGETS) $(OUTPUT)*.a $(OUTPUT)*liblockdep*.so* $(VERSION_FILES) $(OUTPUT).*.d $(OUTPUT).*.cmd
- $(RM) tags TAGS
-
-PHONY += force
-force:
-
-# Declare the contents of the .PHONY variable as phony. We keep that
-# information in a variable so we can use it in if_changed and friends.
-.PHONY: $(PHONY)
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-#include <stddef.h>
-#include <stdbool.h>
-#include <linux/compiler.h>
-#include <linux/lockdep.h>
-#include <unistd.h>
-#include <sys/syscall.h>
-
-static __thread struct task_struct current_obj;
-
-/* lockdep wants these */
-bool debug_locks = true;
-bool debug_locks_silent;
-
-__attribute__((destructor)) static void liblockdep_exit(void)
-{
- debug_check_no_locks_held();
-}
-
-struct task_struct *__curr(void)
-{
- if (current_obj.pid == 0) {
- /* Makes lockdep output pretty */
- prctl(PR_GET_NAME, current_obj.comm);
- current_obj.pid = syscall(__NR_gettid);
- }
-
- return ¤t_obj;
-}
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _LIBLOCKDEP_COMMON_H
-#define _LIBLOCKDEP_COMMON_H
-
-#include <pthread.h>
-
-#define NR_LOCKDEP_CACHING_CLASSES 2
-#define MAX_LOCKDEP_SUBCLASSES 8UL
-
-#ifndef CALLER_ADDR0
-#define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
-#endif
-
-#ifndef _RET_IP_
-#define _RET_IP_ CALLER_ADDR0
-#endif
-
-#ifndef _THIS_IP_
-#define _THIS_IP_ ({ __label__ __here; __here: (unsigned long)&&__here; })
-#endif
-
-struct lockdep_subclass_key {
- char __one_byte;
-};
-
-struct lock_class_key {
- struct lockdep_subclass_key subkeys[MAX_LOCKDEP_SUBCLASSES];
-};
-
-struct lockdep_map {
- struct lock_class_key *key;
- struct lock_class *class_cache[NR_LOCKDEP_CACHING_CLASSES];
- const char *name;
-#ifdef CONFIG_LOCK_STAT
- int cpu;
- unsigned long ip;
-#endif
-};
-
-void lockdep_init_map(struct lockdep_map *lock, const char *name,
- struct lock_class_key *key, int subclass);
-void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
- int trylock, int read, int check,
- struct lockdep_map *nest_lock, unsigned long ip);
-void lock_release(struct lockdep_map *lock, unsigned long ip);
-void lockdep_reset_lock(struct lockdep_map *lock);
-void lockdep_register_key(struct lock_class_key *key);
-void lockdep_unregister_key(struct lock_class_key *key);
-extern void debug_check_no_locks_freed(const void *from, unsigned long len);
-
-#define STATIC_LOCKDEP_MAP_INIT(_name, _key) \
- { .name = (_name), .key = (void *)(_key), }
-
-#endif
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _LIBLOCKDEP_MUTEX_H
-#define _LIBLOCKDEP_MUTEX_H
-
-#include <pthread.h>
-#include "common.h"
-
-struct liblockdep_pthread_mutex {
- pthread_mutex_t mutex;
- struct lock_class_key key;
- struct lockdep_map dep_map;
-};
-
-typedef struct liblockdep_pthread_mutex liblockdep_pthread_mutex_t;
-
-#define LIBLOCKDEP_PTHREAD_MUTEX_INITIALIZER(mtx) \
- (const struct liblockdep_pthread_mutex) { \
- .mutex = PTHREAD_MUTEX_INITIALIZER, \
- .dep_map = STATIC_LOCKDEP_MAP_INIT(#mtx, &((&(mtx))->dep_map)), \
-}
-
-static inline int __mutex_init(liblockdep_pthread_mutex_t *lock,
- const char *name,
- struct lock_class_key *key,
- const pthread_mutexattr_t *__mutexattr)
-{
- lockdep_init_map(&lock->dep_map, name, key, 0);
- return pthread_mutex_init(&lock->mutex, __mutexattr);
-}
-
-#define liblockdep_pthread_mutex_init(mutex, mutexattr) \
-({ \
- lockdep_register_key(&(mutex)->key); \
- __mutex_init((mutex), #mutex, &(mutex)->key, (mutexattr)); \
-})
-
-static inline int liblockdep_pthread_mutex_lock(liblockdep_pthread_mutex_t *lock)
-{
- lock_acquire(&lock->dep_map, 0, 0, 0, 1, NULL, (unsigned long)_RET_IP_);
- return pthread_mutex_lock(&lock->mutex);
-}
-
-static inline int liblockdep_pthread_mutex_unlock(liblockdep_pthread_mutex_t *lock)
-{
- lock_release(&lock->dep_map, (unsigned long)_RET_IP_);
- return pthread_mutex_unlock(&lock->mutex);
-}
-
-static inline int liblockdep_pthread_mutex_trylock(liblockdep_pthread_mutex_t *lock)
-{
- lock_acquire(&lock->dep_map, 0, 1, 0, 1, NULL, (unsigned long)_RET_IP_);
- return pthread_mutex_trylock(&lock->mutex) == 0 ? 1 : 0;
-}
-
-static inline int liblockdep_pthread_mutex_destroy(liblockdep_pthread_mutex_t *lock)
-{
- lockdep_reset_lock(&lock->dep_map);
- lockdep_unregister_key(&lock->key);
- return pthread_mutex_destroy(&lock->mutex);
-}
-
-#ifdef __USE_LIBLOCKDEP
-
-#define pthread_mutex_t liblockdep_pthread_mutex_t
-#define pthread_mutex_init liblockdep_pthread_mutex_init
-#define pthread_mutex_lock liblockdep_pthread_mutex_lock
-#define pthread_mutex_unlock liblockdep_pthread_mutex_unlock
-#define pthread_mutex_trylock liblockdep_pthread_mutex_trylock
-#define pthread_mutex_destroy liblockdep_pthread_mutex_destroy
-
-#endif
-
-#endif
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _LIBLOCKDEP_RWLOCK_H
-#define _LIBLOCKDEP_RWLOCK_H
-
-#include <pthread.h>
-#include "common.h"
-
-struct liblockdep_pthread_rwlock {
- pthread_rwlock_t rwlock;
- struct lockdep_map dep_map;
-};
-
-typedef struct liblockdep_pthread_rwlock liblockdep_pthread_rwlock_t;
-
-#define LIBLOCKDEP_PTHREAD_RWLOCK_INITIALIZER(rwl) \
- (struct liblockdep_pthread_rwlock) { \
- .rwlock = PTHREAD_RWLOCK_INITIALIZER, \
- .dep_map = STATIC_LOCKDEP_MAP_INIT(#rwl, &((&(rwl))->dep_map)), \
-}
-
-static inline int __rwlock_init(liblockdep_pthread_rwlock_t *lock,
- const char *name,
- struct lock_class_key *key,
- const pthread_rwlockattr_t *attr)
-{
- lockdep_init_map(&lock->dep_map, name, key, 0);
-
- return pthread_rwlock_init(&lock->rwlock, attr);
-}
-
-#define liblockdep_pthread_rwlock_init(lock, attr) \
-({ \
- static struct lock_class_key __key; \
- \
- __rwlock_init((lock), #lock, &__key, (attr)); \
-})
-
-static inline int liblockdep_pthread_rwlock_rdlock(liblockdep_pthread_rwlock_t *lock)
-{
- lock_acquire(&lock->dep_map, 0, 0, 2, 1, NULL, (unsigned long)_RET_IP_);
- return pthread_rwlock_rdlock(&lock->rwlock);
-
-}
-
-static inline int liblockdep_pthread_rwlock_unlock(liblockdep_pthread_rwlock_t *lock)
-{
- lock_release(&lock->dep_map, (unsigned long)_RET_IP_);
- return pthread_rwlock_unlock(&lock->rwlock);
-}
-
-static inline int liblockdep_pthread_rwlock_wrlock(liblockdep_pthread_rwlock_t *lock)
-{
- lock_acquire(&lock->dep_map, 0, 0, 0, 1, NULL, (unsigned long)_RET_IP_);
- return pthread_rwlock_wrlock(&lock->rwlock);
-}
-
-static inline int liblockdep_pthread_rwlock_tryrdlock(liblockdep_pthread_rwlock_t *lock)
-{
- lock_acquire(&lock->dep_map, 0, 1, 2, 1, NULL, (unsigned long)_RET_IP_);
- return pthread_rwlock_tryrdlock(&lock->rwlock) == 0 ? 1 : 0;
-}
-
-static inline int liblockdep_pthread_rwlock_trywrlock(liblockdep_pthread_rwlock_t *lock)
-{
- lock_acquire(&lock->dep_map, 0, 1, 0, 1, NULL, (unsigned long)_RET_IP_);
- return pthread_rwlock_trywrlock(&lock->rwlock) == 0 ? 1 : 0;
-}
-
-static inline int liblockdep_rwlock_destroy(liblockdep_pthread_rwlock_t *lock)
-{
- return pthread_rwlock_destroy(&lock->rwlock);
-}
-
-#ifdef __USE_LIBLOCKDEP
-
-#define pthread_rwlock_t liblockdep_pthread_rwlock_t
-#define pthread_rwlock_init liblockdep_pthread_rwlock_init
-#define pthread_rwlock_rdlock liblockdep_pthread_rwlock_rdlock
-#define pthread_rwlock_unlock liblockdep_pthread_rwlock_unlock
-#define pthread_rwlock_wrlock liblockdep_pthread_rwlock_wrlock
-#define pthread_rwlock_tryrdlock liblockdep_pthread_rwlock_tryrdlock
-#define pthread_rwlock_trywrlock liblockdep_pthread_rwlock_trywrlock
-#define pthread_rwlock_destroy liblockdep_rwlock_destroy
-
-#endif
-
-#endif
+++ /dev/null
-#!/bin/bash
-
-LD_PRELOAD="./liblockdep.so $LD_PRELOAD" "$@"
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/lockdep.h>
-#include <stdlib.h>
-
-/* Trivial API wrappers, we don't (yet) have RCU in user-space: */
-#define hlist_for_each_entry_rcu hlist_for_each_entry
-#define hlist_add_head_rcu hlist_add_head
-#define hlist_del_rcu hlist_del
-#define list_for_each_entry_rcu list_for_each_entry
-#define list_add_tail_rcu list_add_tail
-
-u32 prandom_u32(void)
-{
- /* Used only by lock_pin_lock() which is dead code */
- abort();
-}
-
-void print_irqtrace_events(struct task_struct *curr)
-{
- abort();
-}
-
-static struct new_utsname *init_utsname(void)
-{
- static struct new_utsname n = (struct new_utsname) {
- .release = "liblockdep",
- .version = LIBLOCKDEP_VERSION,
- };
-
- return &n;
-}
-
-#include "../../../kernel/locking/lockdep.c"
+++ /dev/null
-#include "../../../kernel/locking/lockdep_internals.h"
+++ /dev/null
-#include "../../../kernel/locking/lockdep_states.h"
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
-#include <pthread.h>
-#include <stdio.h>
-#include <dlfcn.h>
-#include <stdlib.h>
-#include <sysexits.h>
-#include <unistd.h>
-#include "include/liblockdep/mutex.h"
-#include "../../include/linux/rbtree.h"
-
-/**
- * struct lock_lookup - liblockdep's view of a single unique lock
- * @orig: pointer to the original pthread lock, used for lookups
- * @dep_map: lockdep's dep_map structure
- * @key: lockdep's key structure
- * @node: rb-tree node used to store the lock in a global tree
- * @name: a unique name for the lock
- */
-struct lock_lookup {
- void *orig; /* Original pthread lock, used for lookups */
- struct lockdep_map dep_map; /* Since all locks are dynamic, we need
- * a dep_map and a key for each lock */
- /*
- * Wait, there's no support for key classes? Yup :(
- * Most big projects wrap the pthread api with their own calls to
- * be compatible with different locking methods. This means that
- * "classes" will be brokes since the function that creates all
- * locks will point to a generic locking function instead of the
- * actual code that wants to do the locking.
- */
- struct lock_class_key key;
- struct rb_node node;
-#define LIBLOCKDEP_MAX_LOCK_NAME 22
- char name[LIBLOCKDEP_MAX_LOCK_NAME];
-};
-
-/* This is where we store our locks */
-static struct rb_root locks = RB_ROOT;
-static pthread_rwlock_t locks_rwlock = PTHREAD_RWLOCK_INITIALIZER;
-
-/* pthread mutex API */
-
-#ifdef __GLIBC__
-extern int __pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr);
-extern int __pthread_mutex_lock(pthread_mutex_t *mutex);
-extern int __pthread_mutex_trylock(pthread_mutex_t *mutex);
-extern int __pthread_mutex_unlock(pthread_mutex_t *mutex);
-extern int __pthread_mutex_destroy(pthread_mutex_t *mutex);
-#else
-#define __pthread_mutex_init NULL
-#define __pthread_mutex_lock NULL
-#define __pthread_mutex_trylock NULL
-#define __pthread_mutex_unlock NULL
-#define __pthread_mutex_destroy NULL
-#endif
-static int (*ll_pthread_mutex_init)(pthread_mutex_t *mutex,
- const pthread_mutexattr_t *attr) = __pthread_mutex_init;
-static int (*ll_pthread_mutex_lock)(pthread_mutex_t *mutex) = __pthread_mutex_lock;
-static int (*ll_pthread_mutex_trylock)(pthread_mutex_t *mutex) = __pthread_mutex_trylock;
-static int (*ll_pthread_mutex_unlock)(pthread_mutex_t *mutex) = __pthread_mutex_unlock;
-static int (*ll_pthread_mutex_destroy)(pthread_mutex_t *mutex) = __pthread_mutex_destroy;
-
-/* pthread rwlock API */
-
-#ifdef __GLIBC__
-extern int __pthread_rwlock_init(pthread_rwlock_t *rwlock, const pthread_rwlockattr_t *attr);
-extern int __pthread_rwlock_destroy(pthread_rwlock_t *rwlock);
-extern int __pthread_rwlock_wrlock(pthread_rwlock_t *rwlock);
-extern int __pthread_rwlock_trywrlock(pthread_rwlock_t *rwlock);
-extern int __pthread_rwlock_rdlock(pthread_rwlock_t *rwlock);
-extern int __pthread_rwlock_tryrdlock(pthread_rwlock_t *rwlock);
-extern int __pthread_rwlock_unlock(pthread_rwlock_t *rwlock);
-#else
-#define __pthread_rwlock_init NULL
-#define __pthread_rwlock_destroy NULL
-#define __pthread_rwlock_wrlock NULL
-#define __pthread_rwlock_trywrlock NULL
-#define __pthread_rwlock_rdlock NULL
-#define __pthread_rwlock_tryrdlock NULL
-#define __pthread_rwlock_unlock NULL
-#endif
-
-static int (*ll_pthread_rwlock_init)(pthread_rwlock_t *rwlock,
- const pthread_rwlockattr_t *attr) = __pthread_rwlock_init;
-static int (*ll_pthread_rwlock_destroy)(pthread_rwlock_t *rwlock) = __pthread_rwlock_destroy;
-static int (*ll_pthread_rwlock_rdlock)(pthread_rwlock_t *rwlock) = __pthread_rwlock_rdlock;
-static int (*ll_pthread_rwlock_tryrdlock)(pthread_rwlock_t *rwlock) = __pthread_rwlock_tryrdlock;
-static int (*ll_pthread_rwlock_trywrlock)(pthread_rwlock_t *rwlock) = __pthread_rwlock_trywrlock;
-static int (*ll_pthread_rwlock_wrlock)(pthread_rwlock_t *rwlock) = __pthread_rwlock_wrlock;
-static int (*ll_pthread_rwlock_unlock)(pthread_rwlock_t *rwlock) = __pthread_rwlock_unlock;
-
-enum { none, prepare, done, } __init_state;
-static void init_preload(void);
-static void try_init_preload(void)
-{
- if (__init_state != done)
- init_preload();
-}
-
-static struct rb_node **__get_lock_node(void *lock, struct rb_node **parent)
-{
- struct rb_node **node = &locks.rb_node;
- struct lock_lookup *l;
-
- *parent = NULL;
-
- while (*node) {
- l = rb_entry(*node, struct lock_lookup, node);
-
- *parent = *node;
- if (lock < l->orig)
- node = &l->node.rb_left;
- else if (lock > l->orig)
- node = &l->node.rb_right;
- else
- return node;
- }
-
- return node;
-}
-
-#ifndef LIBLOCKDEP_STATIC_ENTRIES
-#define LIBLOCKDEP_STATIC_ENTRIES 1024
-#endif
-
-static struct lock_lookup __locks[LIBLOCKDEP_STATIC_ENTRIES];
-static int __locks_nr;
-
-static inline bool is_static_lock(struct lock_lookup *lock)
-{
- return lock >= __locks && lock < __locks + ARRAY_SIZE(__locks);
-}
-
-static struct lock_lookup *alloc_lock(void)
-{
- if (__init_state != done) {
- /*
- * Some programs attempt to initialize and use locks in their
- * allocation path. This means that a call to malloc() would
- * result in locks being initialized and locked.
- *
- * Why is it an issue for us? dlsym() below will try allocating
- * to give us the original function. Since this allocation will
- * result in a locking operations, we have to let pthread deal
- * with it, but we can't! we don't have the pointer to the
- * original API since we're inside dlsym() trying to get it
- */
-
- int idx = __locks_nr++;
- if (idx >= ARRAY_SIZE(__locks)) {
- dprintf(STDERR_FILENO,
- "LOCKDEP error: insufficient LIBLOCKDEP_STATIC_ENTRIES\n");
- exit(EX_UNAVAILABLE);
- }
- return __locks + idx;
- }
-
- return malloc(sizeof(struct lock_lookup));
-}
-
-static inline void free_lock(struct lock_lookup *lock)
-{
- if (likely(!is_static_lock(lock)))
- free(lock);
-}
-
-/**
- * __get_lock - find or create a lock instance
- * @lock: pointer to a pthread lock function
- *
- * Try to find an existing lock in the rbtree using the provided pointer. If
- * one wasn't found - create it.
- */
-static struct lock_lookup *__get_lock(void *lock)
-{
- struct rb_node **node, *parent;
- struct lock_lookup *l;
-
- ll_pthread_rwlock_rdlock(&locks_rwlock);
- node = __get_lock_node(lock, &parent);
- ll_pthread_rwlock_unlock(&locks_rwlock);
- if (*node) {
- return rb_entry(*node, struct lock_lookup, node);
- }
-
- /* We didn't find the lock, let's create it */
- l = alloc_lock();
- if (l == NULL)
- return NULL;
-
- l->orig = lock;
- /*
- * Currently the name of the lock is the ptr value of the pthread lock,
- * while not optimal, it makes debugging a bit easier.
- *
- * TODO: Get the real name of the lock using libdwarf
- */
- sprintf(l->name, "%p", lock);
- lockdep_init_map(&l->dep_map, l->name, &l->key, 0);
-
- ll_pthread_rwlock_wrlock(&locks_rwlock);
- /* This might have changed since the last time we fetched it */
- node = __get_lock_node(lock, &parent);
- rb_link_node(&l->node, parent, node);
- rb_insert_color(&l->node, &locks);
- ll_pthread_rwlock_unlock(&locks_rwlock);
-
- return l;
-}
-
-static void __del_lock(struct lock_lookup *lock)
-{
- ll_pthread_rwlock_wrlock(&locks_rwlock);
- rb_erase(&lock->node, &locks);
- ll_pthread_rwlock_unlock(&locks_rwlock);
- free_lock(lock);
-}
-
-int pthread_mutex_init(pthread_mutex_t *mutex,
- const pthread_mutexattr_t *attr)
-{
- int r;
-
- /*
- * We keep trying to init our preload module because there might be
- * code in init sections that tries to touch locks before we are
- * initialized, in that case we'll need to manually call preload
- * to get us going.
- *
- * Funny enough, kernel's lockdep had the same issue, and used
- * (almost) the same solution. See look_up_lock_class() in
- * kernel/locking/lockdep.c for details.
- */
- try_init_preload();
-
- r = ll_pthread_mutex_init(mutex, attr);
- if (r == 0)
- /*
- * We do a dummy initialization here so that lockdep could
- * warn us if something fishy is going on - such as
- * initializing a held lock.
- */
- __get_lock(mutex);
-
- return r;
-}
-
-int pthread_mutex_lock(pthread_mutex_t *mutex)
-{
- int r;
-
- try_init_preload();
-
- lock_acquire(&__get_lock(mutex)->dep_map, 0, 0, 0, 1, NULL,
- (unsigned long)_RET_IP_);
- /*
- * Here's the thing with pthread mutexes: unlike the kernel variant,
- * they can fail.
- *
- * This means that the behaviour here is a bit different from what's
- * going on in the kernel: there we just tell lockdep that we took the
- * lock before actually taking it, but here we must deal with the case
- * that locking failed.
- *
- * To do that we'll "release" the lock if locking failed - this way
- * we'll get lockdep doing the correct checks when we try to take
- * the lock, and if that fails - we'll be back to the correct
- * state by releasing it.
- */
- r = ll_pthread_mutex_lock(mutex);
- if (r)
- lock_release(&__get_lock(mutex)->dep_map, (unsigned long)_RET_IP_);
-
- return r;
-}
-
-int pthread_mutex_trylock(pthread_mutex_t *mutex)
-{
- int r;
-
- try_init_preload();
-
- lock_acquire(&__get_lock(mutex)->dep_map, 0, 1, 0, 1, NULL, (unsigned long)_RET_IP_);
- r = ll_pthread_mutex_trylock(mutex);
- if (r)
- lock_release(&__get_lock(mutex)->dep_map, (unsigned long)_RET_IP_);
-
- return r;
-}
-
-int pthread_mutex_unlock(pthread_mutex_t *mutex)
-{
- int r;
-
- try_init_preload();
-
- lock_release(&__get_lock(mutex)->dep_map, (unsigned long)_RET_IP_);
- /*
- * Just like taking a lock, only in reverse!
- *
- * If we fail releasing the lock, tell lockdep we're holding it again.
- */
- r = ll_pthread_mutex_unlock(mutex);
- if (r)
- lock_acquire(&__get_lock(mutex)->dep_map, 0, 0, 0, 1, NULL, (unsigned long)_RET_IP_);
-
- return r;
-}
-
-int pthread_mutex_destroy(pthread_mutex_t *mutex)
-{
- try_init_preload();
-
- /*
- * Let's see if we're releasing a lock that's held.
- *
- * TODO: Hook into free() and add that check there as well.
- */
- debug_check_no_locks_freed(mutex, sizeof(*mutex));
- __del_lock(__get_lock(mutex));
- return ll_pthread_mutex_destroy(mutex);
-}
-
-/* This is the rwlock part, very similar to what happened with mutex above */
-int pthread_rwlock_init(pthread_rwlock_t *rwlock,
- const pthread_rwlockattr_t *attr)
-{
- int r;
-
- try_init_preload();
-
- r = ll_pthread_rwlock_init(rwlock, attr);
- if (r == 0)
- __get_lock(rwlock);
-
- return r;
-}
-
-int pthread_rwlock_destroy(pthread_rwlock_t *rwlock)
-{
- try_init_preload();
-
- debug_check_no_locks_freed(rwlock, sizeof(*rwlock));
- __del_lock(__get_lock(rwlock));
- return ll_pthread_rwlock_destroy(rwlock);
-}
-
-int pthread_rwlock_rdlock(pthread_rwlock_t *rwlock)
-{
- int r;
-
- init_preload();
-
- lock_acquire(&__get_lock(rwlock)->dep_map, 0, 0, 2, 1, NULL, (unsigned long)_RET_IP_);
- r = ll_pthread_rwlock_rdlock(rwlock);
- if (r)
- lock_release(&__get_lock(rwlock)->dep_map, (unsigned long)_RET_IP_);
-
- return r;
-}
-
-int pthread_rwlock_tryrdlock(pthread_rwlock_t *rwlock)
-{
- int r;
-
- init_preload();
-
- lock_acquire(&__get_lock(rwlock)->dep_map, 0, 1, 2, 1, NULL, (unsigned long)_RET_IP_);
- r = ll_pthread_rwlock_tryrdlock(rwlock);
- if (r)
- lock_release(&__get_lock(rwlock)->dep_map, (unsigned long)_RET_IP_);
-
- return r;
-}
-
-int pthread_rwlock_trywrlock(pthread_rwlock_t *rwlock)
-{
- int r;
-
- init_preload();
-
- lock_acquire(&__get_lock(rwlock)->dep_map, 0, 1, 0, 1, NULL, (unsigned long)_RET_IP_);
- r = ll_pthread_rwlock_trywrlock(rwlock);
- if (r)
- lock_release(&__get_lock(rwlock)->dep_map, (unsigned long)_RET_IP_);
-
- return r;
-}
-
-int pthread_rwlock_wrlock(pthread_rwlock_t *rwlock)
-{
- int r;
-
- init_preload();
-
- lock_acquire(&__get_lock(rwlock)->dep_map, 0, 0, 0, 1, NULL, (unsigned long)_RET_IP_);
- r = ll_pthread_rwlock_wrlock(rwlock);
- if (r)
- lock_release(&__get_lock(rwlock)->dep_map, (unsigned long)_RET_IP_);
-
- return r;
-}
-
-int pthread_rwlock_unlock(pthread_rwlock_t *rwlock)
-{
- int r;
-
- init_preload();
-
- lock_release(&__get_lock(rwlock)->dep_map, (unsigned long)_RET_IP_);
- r = ll_pthread_rwlock_unlock(rwlock);
- if (r)
- lock_acquire(&__get_lock(rwlock)->dep_map, 0, 0, 0, 1, NULL, (unsigned long)_RET_IP_);
-
- return r;
-}
-
-__attribute__((constructor)) static void init_preload(void)
-{
- if (__init_state == done)
- return;
-
-#ifndef __GLIBC__
- __init_state = prepare;
-
- ll_pthread_mutex_init = dlsym(RTLD_NEXT, "pthread_mutex_init");
- ll_pthread_mutex_lock = dlsym(RTLD_NEXT, "pthread_mutex_lock");
- ll_pthread_mutex_trylock = dlsym(RTLD_NEXT, "pthread_mutex_trylock");
- ll_pthread_mutex_unlock = dlsym(RTLD_NEXT, "pthread_mutex_unlock");
- ll_pthread_mutex_destroy = dlsym(RTLD_NEXT, "pthread_mutex_destroy");
-
- ll_pthread_rwlock_init = dlsym(RTLD_NEXT, "pthread_rwlock_init");
- ll_pthread_rwlock_destroy = dlsym(RTLD_NEXT, "pthread_rwlock_destroy");
- ll_pthread_rwlock_rdlock = dlsym(RTLD_NEXT, "pthread_rwlock_rdlock");
- ll_pthread_rwlock_tryrdlock = dlsym(RTLD_NEXT, "pthread_rwlock_tryrdlock");
- ll_pthread_rwlock_wrlock = dlsym(RTLD_NEXT, "pthread_rwlock_wrlock");
- ll_pthread_rwlock_trywrlock = dlsym(RTLD_NEXT, "pthread_rwlock_trywrlock");
- ll_pthread_rwlock_unlock = dlsym(RTLD_NEXT, "pthread_rwlock_unlock");
-#endif
-
- __init_state = done;
-}
+++ /dev/null
-#include "../../lib/rbtree.c"
+++ /dev/null
-#! /bin/bash
-# SPDX-License-Identifier: GPL-2.0
-
-if ! make >/dev/null; then
- echo "Building liblockdep failed."
- echo "FAILED!"
- exit 1
-fi
-
-find tests -name '*.c' | sort | while read -r i; do
- testname=$(basename "$i" .c)
- echo -ne "$testname... "
- if gcc -o "tests/$testname" -pthread "$i" liblockdep.a -Iinclude -D__USE_LIBLOCKDEP &&
- timeout 1 "tests/$testname" 2>&1 | /bin/bash "tests/${testname}.sh"; then
- echo "PASSED!"
- else
- echo "FAILED!"
- fi
- rm -f "tests/$testname"
-done
-
-find tests -name '*.c' | sort | while read -r i; do
- testname=$(basename "$i" .c)
- echo -ne "(PRELOAD) $testname... "
- if gcc -o "tests/$testname" -pthread -Iinclude "$i" &&
- timeout 1 ./lockdep "tests/$testname" 2>&1 |
- /bin/bash "tests/${testname}.sh"; then
- echo "PASSED!"
- else
- echo "FAILED!"
- fi
- rm -f "tests/$testname"
-done
-
-find tests -name '*.c' | sort | while read -r i; do
- testname=$(basename "$i" .c)
- echo -ne "(PRELOAD + Valgrind) $testname... "
- if gcc -o "tests/$testname" -pthread -Iinclude "$i" &&
- { timeout 10 valgrind --read-var-info=yes ./lockdep "./tests/$testname" >& "tests/${testname}.vg.out"; true; } &&
- /bin/bash "tests/${testname}.sh" < "tests/${testname}.vg.out" &&
- ! grep -Eq '(^==[0-9]*== (Invalid |Uninitialised ))|Mismatched free|Source and destination overlap| UME ' "tests/${testname}.vg.out"; then
- echo "PASSED!"
- else
- echo "FAILED!"
- fi
- rm -f "tests/$testname"
-done
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-#include <liblockdep/mutex.h>
-
-int main(void)
-{
- pthread_mutex_t a;
-
- pthread_mutex_init(&a, NULL);
-
- pthread_mutex_lock(&a);
- pthread_mutex_lock(&a);
-
- return 0;
-}
+++ /dev/null
-#!/bin/bash
-grep -q 'WARNING: possible recursive locking detected'
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-#include <liblockdep/mutex.h>
-
-void main(void)
-{
- pthread_mutex_t a, b;
-
- pthread_mutex_init(&a, NULL);
- pthread_mutex_init(&b, NULL);
-
- pthread_mutex_lock(&a);
- pthread_mutex_lock(&b);
- pthread_mutex_lock(&a);
-}
+++ /dev/null
-#!/bin/bash
-grep -q 'WARNING: possible recursive locking detected'
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-#include <liblockdep/mutex.h>
-#include "common.h"
-
-void main(void)
-{
- pthread_mutex_t a, b;
-
- pthread_mutex_init(&a, NULL);
- pthread_mutex_init(&b, NULL);
-
- LOCK_UNLOCK_2(a, b);
- LOCK_UNLOCK_2(b, a);
-
- pthread_mutex_destroy(&b);
- pthread_mutex_destroy(&a);
-
- pthread_mutex_init(&a, NULL);
- pthread_mutex_init(&b, NULL);
-
- LOCK_UNLOCK_2(a, b);
- LOCK_UNLOCK_2(b, a);
-
- pthread_mutex_destroy(&b);
- pthread_mutex_destroy(&a);
-}
+++ /dev/null
-#!/bin/bash
-grep -q 'WARNING: possible circular locking dependency detected'
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-#include <stdio.h>
-#include <pthread.h>
-
-pthread_mutex_t a = PTHREAD_MUTEX_INITIALIZER;
-pthread_mutex_t b = PTHREAD_MUTEX_INITIALIZER;
-pthread_barrier_t bar;
-
-void *ba_lock(void *arg)
-{
- int ret, i;
-
- pthread_mutex_lock(&b);
-
- if (pthread_barrier_wait(&bar) == PTHREAD_BARRIER_SERIAL_THREAD)
- pthread_barrier_destroy(&bar);
-
- pthread_mutex_lock(&a);
-
- pthread_mutex_unlock(&a);
- pthread_mutex_unlock(&b);
-}
-
-int main(void)
-{
- pthread_t t;
-
- pthread_barrier_init(&bar, NULL, 2);
-
- if (pthread_create(&t, NULL, ba_lock, NULL)) {
- fprintf(stderr, "pthread_create() failed\n");
- return 1;
- }
- pthread_mutex_lock(&a);
-
- if (pthread_barrier_wait(&bar) == PTHREAD_BARRIER_SERIAL_THREAD)
- pthread_barrier_destroy(&bar);
-
- pthread_mutex_lock(&b);
-
- pthread_mutex_unlock(&b);
- pthread_mutex_unlock(&a);
-
- pthread_join(t, NULL);
-
- return 0;
-}
+++ /dev/null
-#!/bin/bash
-grep -q 'WARNING: possible circular locking dependency detected'
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-#include <liblockdep/mutex.h>
-#include "common.h"
-
-void main(void)
-{
- pthread_mutex_t a, b, c;
-
- pthread_mutex_init(&a, NULL);
- pthread_mutex_init(&b, NULL);
- pthread_mutex_init(&c, NULL);
-
- LOCK_UNLOCK_2(a, b);
- LOCK_UNLOCK_2(b, c);
- LOCK_UNLOCK_2(c, a);
-
- pthread_mutex_destroy(&c);
- pthread_mutex_destroy(&b);
- pthread_mutex_destroy(&a);
-}
+++ /dev/null
-#!/bin/bash
-grep -q 'WARNING: possible circular locking dependency detected'
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-#include <liblockdep/mutex.h>
-#include "common.h"
-
-void main(void)
-{
- pthread_mutex_t a, b, c, d;
-
- pthread_mutex_init(&a, NULL);
- pthread_mutex_init(&b, NULL);
- pthread_mutex_init(&c, NULL);
- pthread_mutex_init(&d, NULL);
-
- LOCK_UNLOCK_2(a, b);
- LOCK_UNLOCK_2(b, c);
- LOCK_UNLOCK_2(c, d);
- LOCK_UNLOCK_2(d, a);
-
- pthread_mutex_destroy(&d);
- pthread_mutex_destroy(&c);
- pthread_mutex_destroy(&b);
- pthread_mutex_destroy(&a);
-}
+++ /dev/null
-#!/bin/bash
-grep -q 'WARNING: possible circular locking dependency detected'
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-#include <liblockdep/mutex.h>
-#include "common.h"
-
-void main(void)
-{
- pthread_mutex_t a, b, c;
-
- pthread_mutex_init(&a, NULL);
- pthread_mutex_init(&b, NULL);
- pthread_mutex_init(&c, NULL);
-
- LOCK_UNLOCK_2(a, b);
- LOCK_UNLOCK_2(c, a);
- LOCK_UNLOCK_2(b, c);
-
- pthread_mutex_destroy(&c);
- pthread_mutex_destroy(&b);
- pthread_mutex_destroy(&a);
-}
+++ /dev/null
-#!/bin/bash
-grep -q 'WARNING: possible circular locking dependency detected'
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-#include <liblockdep/mutex.h>
-#include "common.h"
-
-void main(void)
-{
- pthread_mutex_t a, b, c, d;
-
- pthread_mutex_init(&a, NULL);
- pthread_mutex_init(&b, NULL);
- pthread_mutex_init(&c, NULL);
- pthread_mutex_init(&d, NULL);
-
- LOCK_UNLOCK_2(a, b);
- LOCK_UNLOCK_2(c, d);
- LOCK_UNLOCK_2(b, c);
- LOCK_UNLOCK_2(d, a);
-
- pthread_mutex_destroy(&d);
- pthread_mutex_destroy(&c);
- pthread_mutex_destroy(&b);
- pthread_mutex_destroy(&a);
-}
+++ /dev/null
-#!/bin/bash
-grep -q 'WARNING: possible circular locking dependency detected'
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-#include <liblockdep/mutex.h>
-#include "common.h"
-
-void main(void)
-{
- pthread_mutex_t a, b, c, d;
-
- pthread_mutex_init(&a, NULL);
- pthread_mutex_init(&b, NULL);
- pthread_mutex_init(&c, NULL);
- pthread_mutex_init(&d, NULL);
-
- LOCK_UNLOCK_2(a, b);
- LOCK_UNLOCK_2(c, d);
- LOCK_UNLOCK_2(b, d);
- LOCK_UNLOCK_2(d, a);
-
- pthread_mutex_destroy(&d);
- pthread_mutex_destroy(&c);
- pthread_mutex_destroy(&b);
- pthread_mutex_destroy(&a);
-}
+++ /dev/null
-#!/bin/bash
-grep -q 'WARNING: possible circular locking dependency detected'
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-#include <liblockdep/rwlock.h>
-
-void main(void)
-{
- pthread_rwlock_t a, b;
-
- pthread_rwlock_init(&a, NULL);
- pthread_rwlock_init(&b, NULL);
-
- pthread_rwlock_wrlock(&a);
- pthread_rwlock_rdlock(&b);
- pthread_rwlock_wrlock(&a);
-}
+++ /dev/null
-#!/bin/bash
-grep -q 'WARNING: possible recursive locking detected'
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _LIBLOCKDEP_TEST_COMMON_H
-#define _LIBLOCKDEP_TEST_COMMON_H
-
-#define LOCK_UNLOCK_2(a, b) \
- do { \
- pthread_mutex_lock(&(a)); \
- pthread_mutex_lock(&(b)); \
- pthread_mutex_unlock(&(b)); \
- pthread_mutex_unlock(&(a)); \
- } while(0)
-
-#endif
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-#include <liblockdep/mutex.h>
-
-void main(void)
-{
- pthread_mutex_t a;
-
- pthread_mutex_init(&a, NULL);
-
- pthread_mutex_lock(&a);
- pthread_mutex_unlock(&a);
- pthread_mutex_unlock(&a);
-
- pthread_mutex_destroy(&a);
-}
+++ /dev/null
-#!/bin/bash
-grep -q 'WARNING: bad unlock balance detected'
projects / platform / kernel / linux-rpi.git / commitdiff